Mike Taylor, the head of TT Fusion has revealed some more details about LEGO Star Wars : The Force Awakens in a conversation with Game Informer.

Taylor said that the team developing the game, had been allowed by Disney and Lucasfilm to create some additional content for the game. This content will take place before the events of The Force Awakens and will fill in some more character backstory.
There will be six missions called bridge content, that players will have access to when finishing the game’s main storyline. Each bridge mission will need to be unlocked by collecting gold LEGO bricks.
Some of the story details that will be explored in the side missions will be how C-3PO got his red arm and how Han and Chewie captured those vicious rathtars that were aboard their ship.

Below is the reveal trailer to get you exited to return to a galaxy far, far away: